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Spatio-temporal microdifferentiation of water-strider (Gerris) populations

Published online by Cambridge University Press:  14 April 2009

Sirkka-Liisa Varvio-Aho
Affiliation:
Department of Genetics, University of Helsinki, P. Rautatiekatu 13, SF-00100 Helsinki 10, Finland
Pekka Pamilo
Affiliation:
Department of Genetics, University of Helsinki, P. Rautatiekatu 13, SF-00100 Helsinki 10, Finland
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Spatial and temporal differentiation in Gerris lacustris and G. odontogaster (Heteroptera, Gerridae) were studied in restricted areas, where one population of each species was subdivided into several subpopulations. The aim of the study was to relate genetic population parameters to ecological population structure studied by mark-recapture methods in the same pond systems. Marked differentiation between the subpopulations and significant enzyme allele frequency changes between subsequent generations were found at several loci. It is suggested that non-selective forces are a sufficient explanation for the observed differences.

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Type
Research Article
Copyright
Copyright © Cambridge University Press 1981